公开(公告)号：US10432043B2

公开(公告)日：2019-10-01

申请号：US15381303

申请日：2016-12-16

Applicant: Ford Global Technologies, LLC

Inventor： Chun Tang ,  Wei Wu ,  Feng Liang ,  Michael W. Degner

IPC: H02K1/27 ,  H02K1/14 ,  H02K3/32

Abstract: An electric machine having a rotor is disclosed. The rotor defines a cavity containing a magnet, an outer periphery, and a top bridge therebetween that includes at least two slots each having a length in a radial direction. A maximum of the lengths is closest to a Q-axis and a minimum of the lengths is closest to a D-axis. As the electric machine is operating, a rate of change in airgap flux density through the top bridge differs.

公开(公告)号：US20190103795A1

公开(公告)日：2019-04-04

申请号：US15720754

申请日：2017-09-29

Applicant: Ford Global Technologies, LLC

Inventor： Feng Liang ,  Lusu Guo ,  Michael W. Degner ,  Wei Wu ,  Chun Tang

IPC: H02K23/04 ,  H02K1/17 ,  H02K1/12 ,  H02K23/42 ,  H02K11/22

Abstract: A permanent magnet machine includes a rotor and an irregular polyhedron shaped magnet assembly. The rotor may define at least one magnet opening and may be configured to rotate within a circular opening defined by a stator. The irregular polyhedron shaped magnet assembly may be disposed in the magnet opening and may define a magnetization direction, wherein a height along the magnetization direction and perpendicular with a lamination plane of the rotor is greater at both ends than at a central portion disposed therebetween.

公开(公告)号：US20180241262A1

公开(公告)日：2018-08-23

申请号：US15435890

申请日：2017-02-17

Applicant: FORD GLOBAL TECHNOLOGIES, LLC

Inventor： Chun Tang

IPC: H02K1/27 ,  H02K21/16 ,  H02K1/14

CPC classification number: H02K1/2766 ,  H02K1/165 ,  H02K21/14 ,  H02K21/145 ,  H02K29/03 ,  H02K2213/03

Abstract: A rotor includes nested V-shaped inner and outer pockets defining corresponding pole arc angles relative to a common center bridge axis and vertex, respective inner and outer top bridges, and respective inner and outer center bridges. A ratio of corresponding pole arc angle dependent functions and a ratio of a sum of the inner top bridges and center bridge widths to a sum of the outer top bridges and center bridge widths are same.

公开(公告)号：US11424659B2

公开(公告)日：2022-08-23

申请号：US16155277

申请日：2018-10-09

Applicant: Ford Global Technologies, LLC

Inventor： Shailesh Shrikant Kozarekar ,  Chun Tang ,  Joel Hetrick

IPC: H02K5/24 ,  H02K15/02 ,  H02K1/16 ,  H02K5/00

Abstract: An electric machine includes a cylindrical stator core and a cylindrical housing having an inner diameter. The core has an outer surface and a plurality of projections extending therefrom. An outer diameter of the core measured between tips of diametrically opposing projections is greater than the inner diameter. The core is disposed in the housing with the tips engaging the inner diameter to create an interference fit between the core and housing to reduce housing resonance.

公开(公告)号：US11133718B2

公开(公告)日：2021-09-28

申请号：US16032537

申请日：2018-07-11

Applicant: Ford Global Technologies, LLC

Inventor： Andrew Kasha ,  Jacob Krizan ,  Chun Tang

IPC: H02K3/487 ,  H02K1/14 ,  H02K3/34

Abstract: An electric machine includes a stator having teeth that define open slots and slot closers disposed in the slots. Each slot closers includes a flux bridge surrounded by a nonmagnetic case. The slot closer is disposed between adjacent ones of the teeth with the case engaging and spanning the adjacent teeth. The case forms nonmagnetic gaps between the flux bridge and the adjacent teeth, respectively, to reduce potential for torque ripple.

公开(公告)号：US10958120B2

公开(公告)日：2021-03-23

申请号：US15710073

申请日：2017-09-20

Applicant: Ford Global Technologies, LLC

Inventor： Chun Tang ,  Feng Liang ,  Wei Wu ,  Michael W. Degner

IPC: H02K1/27 ,  H02K29/03

Abstract: A permanent magnet machine is provided. The permanent magnet machine may include a plurality of laminations stacked to form a rotor. Each of the laminations may define a d-axis, and first and second, recessed notches on an outer circumference. The first and second recessed notches may be disposed at ±180/N electrical degrees with respect to the d-axis. N may be a multiple of 6.

公开(公告)号：US20210075280A1

公开(公告)日：2021-03-11

申请号：US16567720

申请日：2019-09-11

Applicant: FORD GLOBAL TECHNOLOGIES, LLC

Inventor： Franco Leonardi ,  Chuanbing Rong ,  Chun Tang ,  Wanfeng Li ,  Michael W. Degner

IPC: H02K1/28 ,  H02K1/27

Abstract: A rotor for an electric machine includes a core comprised of stacked laminations that define pockets between a hub portion and a pole portion. Each of the pockets are configured to receive magnetic material and define center cavities between regions of magnetic material to eliminate a flux leakage path between the magnetic materials. A cured mixture including an epoxy and a magnetic powder is disposed within the center cavities. The magnetic material may include sintered magnets and a cured mixture.

公开(公告)号：US10797544B2

公开(公告)日：2020-10-06

申请号：US15380022

申请日：2016-12-15

Applicant: Ford Global Technologies, LLC

Inventor： Chun Tang ,  Wei Wu ,  Feng Liang ,  Michael W. Degner

IPC: H02K1/27 ,  H02K21/14

Abstract: An electric machine may include a rotor defining a cavity containing a magnet, an outer periphery and a top bridge therebetween. The top bridge defines at least two segments. Each of the segments has a width that is minimum closest to a Q-axis, is maximum closest to a D-axis, and monotonically increases from the minimum to the maximum such that during operation a rate of change of rotor magnetomotive force associated with each segment differs.

公开(公告)号：US20180241269A1

公开(公告)日：2018-08-23

申请号：US15435777

申请日：2017-02-17

Applicant: Ford Global Technologies, LLC

Inventor： Chun Tang ,  Feng Liang ,  Wei Wu ,  Michael W. Degner

IPC: H02K3/28 ,  B60L15/02

CPC classification number: H02K3/28 ,  B60L15/025 ,  B60L2220/54 ,  B60L2220/58 ,  H02K16/04 ,  H02K2213/03 ,  H02K2213/12

Abstract: An electric machine includes a stator carrying two sets of multiphase windings. The sets are electrically isolated from each other and have an angular space displacement of A° electric corresponding to a torque ripple of harmonic order N. Responsive to current flow through the sets with a phase shift of A° electric, N±1 harmonic orders of resulting stator magnetic fields cancel to preclude formation of the torque ripple of harmonic order N.

公开(公告)号：US20170366056A1

公开(公告)日：2017-12-21

申请号：US15182702

申请日：2016-06-15

Applicant: Ford Global Technologies, LLC

Inventor： Chun Tang ,  Wei Wu ,  Joel Hetrick

IPC: H02K1/27

CPC classification number: H02K1/2766

Abstract: An electric machine may include a plurality of sections, each defining a permanent magnet pocket and a field formation chamber. The sections may be stacked to form a rotor such that when walls of the permanent magnet pockets are aligned from end to end, walls of the chambers of at least some of the sections are offset. An adjacent pair of the sections may have different chamber to pocket relative positions to define different pole arc angles. A difference between the first pole arc angle and the second pole arc angle may be equal to a slot pitch of a stator of the electric machine. The slot pitch may be 7.5 mechanical degrees. The chamber may be defined on a radially outward edge of the pocket. The chamber may taper in a radially outward direction.